公开(公告)号：US11079537B2

公开(公告)日：2021-08-03

申请号：US16561656

申请日：2019-09-05

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Ryo Miyabe ,  Keiichi Aiso

IPC: C03B37/014 ,  C03B37/018 ,  C03B37/027 ,  C03C3/06 ,  C03C13/04 ,  C03C25/104 ,  C03C25/1065 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  C03B37/03

Abstract: An optical fiber has a core to which chlorine is added and a clad to which fluorine is added, chlorine of 9000 to 13000 ppm is added to the core, a relative refractive index difference Δ1 of the core to a pure silica glass is 0.09 to 0.13%, a relative refractive index difference Δ2 of the clad to a pure silica glass is −0.36 to −0.17%, a difference (Δ1-Δ2) between the relative refractive index difference Δ1 of the core and the relative refractive index difference Δ2 of the clad is larger than or equal to 0.30%, a mode field diameter at wavelength 1.31 μm is 8.8 to 9.6 μm, and a stress difference occurring at an interface between the core and the clad is lower than or equal to 60 MPa.

公开(公告)号：US20210221987A1

公开(公告)日：2021-07-22

申请号：US17226459

申请日：2021-04-09

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Hidekazu HARA ,  Jae Kyung KIM ,  Jirou HIROISHI ,  Masami TAZUKE ,  Toshihiro SUZUKI ,  Masato IKEUCHI ,  Jiro SAKATO

IPC: C08L23/06 ,  B29B17/04

Abstract: A cellulose fiber-dispersing resin composite material, containing a cellulose fiber dispersed in a resin, wherein the cellulose fiber-dispersing resin composite material contains aggregates of the cellulose fiber, and at least a part of the aggregates is an aggregate having an area of 2.0×104 to 1.0×106 μm2 in a plan view; a formed body using this composite material; and a composite member using this formed body.

公开(公告)号：US11066577B2

公开(公告)日：2021-07-20

申请号：US16056844

申请日：2018-08-07

Applicant: Furukawa Electric Co., Ltd.

Inventor： Naoaki Mihara ,  Noriyuki Kirikae ,  Jirou Sugiyama

IPC: C09J9/02 ,  H01B1/22 ,  C09J11/04 ,  C09J201/00 ,  C09J163/00 ,  C09J7/10 ,  C09J4/00 ,  H01B1/00 ,  C09J7/35 ,  H01B5/14 ,  H01L21/683 ,  H01L23/00 ,  C08K9/02 ,  C08K3/08 ,  C08K7/18

Abstract: The electrically conductive adhesive film comprises a metal particle (P) and a resin (M), the resin (M) comprises a thermosetting resin (M1), and the metal particle (P) has an average particle size (d50) of 20 μm or less and comprises 10% by mass or more of a first metal particle (P1) having a fractal dimension of 1.1 or more when viewed in a projection drawing in a primary particle state.

公开(公告)号：US20210210929A1

公开(公告)日：2021-07-08

申请号：US17187086

申请日：2021-02-26

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Junji YOSHIDA ,  Hirokazu ITOH ,  Satoshi IRINO ,  Yuichiro IRIE ,  Taketsugu SAWAMURA

IPC: H01S5/32 ,  H01S3/067 ,  H01S5/34 ,  H01S5/22 ,  H01S5/20 ,  H01S5/343 ,  H01S5/227 ,  B82Y20/00 ,  H01S5/10 ,  H01S5/02251 ,  H01S5/02253

Abstract: An optical semiconductor device outputting a predetermined wavelength of laser light includes a quantum well active layer positioned between a p-type cladding layer and an n-type cladding layer in thickness direction. The optical semiconductor device includes a separate confinement heterostructure layer positioned between the quantum well active layer and the n-type cladding layer. The optical semiconductor device further includes an electric-field-distribution-control layer positioned between the separate confinement heterostructure layer and the n-type cladding layer and configured by at least two semiconductor layers having band gap energy greater than band gap energy of a barrier layer constituting the quantum well active layer. The optical semiconductor device is applied to a ridge-stripe type laser.

公开(公告)号：US20210186612A1

公开(公告)日：2021-06-24

申请号：US17195844

申请日：2021-03-09

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Shunichi MATSUSHITA ,  Yoshiki NOMURA ,  Shigehiro TAKASAKA ,  Masaki IWAMA

IPC: A61B18/22 ,  G02B6/34 ,  G02B6/26

Abstract: To provide an optical probe capable of changing a traveling direction of an output beam to a sideward direction. The optical probe includes an optical fiber that outputs a beam from a distal end thereof, and a traveling direction changing unit that changes a traveling direction of the output beam to a sideward direction with respect to the optical fiber. The optical probe includes a holder member that is mounted on a distal end side of the optical fiber and holds the optical fiber, and the traveling direction changing unit may be a reflector that is arranged on the holder member and that reflects output beam.

公开(公告)号：US20210184419A1

公开(公告)日：2021-06-17

申请号：US17187147

申请日：2021-02-26

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Haruki OGOSHI ,  Masahito MORIMOTO

IPC: H01S3/094 ,  H01S3/067 ,  H01S3/0915 ,  H01S3/23 ,  H01S3/30

Abstract: A light source for Raman amplification to Raman-amplify signal light includes: plural incoherent light sources that output incoherent light; plural pumping light sources that output second-order pumping light; an optical fiber for Raman amplification to Raman-amplify the incoherent light with the second-order pumping light, and outputs the amplified incoherent light; and an output unit connected to the optical transmission fiber, receiving the amplified incoherent light, and outputting the amplified incoherent light as first-order pumping light having a wavelength that Raman-amplifies the signal light to the optical transmission fiber.

公开(公告)号：US20210180161A1

公开(公告)日：2021-06-17

申请号：US17269872

申请日：2019-08-27

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Akiyoshi ARAKI ,  Yoshiaki OGIWARA

IPC: C22C21/08 ,  C22C21/02 ,  H01B1/02

Abstract: Provided is an aluminum alloy material having high strength and excellent wear resistance, which can be a substitute for an iron-based metal material or a copper-based metal material. The aluminum alloy material has an alloy composition containing 0.05-1.80% by mass of Mg, 0.01-2.00% by mass of Si, and 0.01-1.50% by mass of Fe, the remainder comprising Al and unavoidable impurities, wherein the aluminum alloy material has a fibrous microstructure in which crystal grains extend along substantially one direction, the average value of the short-direction dimension L2 perpendicular to the longitudinal direction of the crystal grains is 500 nm or less in a cross section parallel to the substantially one direction, and the arithmetic mean roughness Ra of a principal surface of the aluminum alloy material is no greater than 1.000 μm.

公开(公告)号：US20210177516A1

公开(公告)日：2021-06-17

申请号：US17190715

申请日：2021-03-03

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Yoshiki NOMURA ,  Kengo WATANABE ,  Shunichi MATSUSHITA

IPC: A61B18/24 ,  G02B6/34

Abstract: An optical probe includes: an optical fiber; a reflecting portion; and a traveling direction changing portion changing a traveling direction of a laser beam of a first wavelength that has transmitted through the reflecting portion to a direction different from a traveling direction before transmitting through the reflecting portion. Further, the traveling direction changing portion is configured by a bending structure having a structure in which a portion on a distal end side of the optical fiber is bent, and the reflecting portion is provided closer to a proximal end side of the optical fiber than the bending structure.

公开(公告)号：US11037594B2

公开(公告)日：2021-06-15

申请号：US16969847

申请日：2019-02-06

Applicant: UACJ CORPORATION ,  FURUKAWA ELECTRIC CO., LTD.

Inventor： Kotaro Kitawaki ,  Makoto Yonemitsu ,  Hideyuki Hatakeyama ,  Takashi Nakayama ,  Yasuo Fujii ,  Ryo Sakamoto

IPC: G11B5/858 ,  G11B5/73 ,  C22C21/00 ,  C22F1/04 ,  C23C18/16 ,  B21B3/00 ,  C23C18/50

Abstract: Provided is an aluminum alloy substrate for a magnetic disk that includes an aluminum alloy containing 0.4 to 3.0 mass % (hereinafter abbreviated as “%”) of Fe, 0.005% to 1.000% of Cu, and 0.005% to 1.000% of Zn, with a balance of Al and unavoidable impurities. This substrate has a ratio A/B of 0.70 or more, where A indicates a distribution density of Al—Fe intermetallic compound particles having maximum diameters of 10 μm or more and less than 16 μm, and B indicates a distribution density of Al—Fe intermetallic compound particles having maximum diameters of 10 μm or more. The distribution density of Al—Fe intermetallic compound particles having maximum diameters of 40 μm or more is at most one per square millimeter. Also provided are a method of fabricating this aluminum alloy substrate for a magnetic disk and a magnetic disk composed of the aluminum alloy substrate for a magnetic disk.

公开(公告)号：US20210170527A1

公开(公告)日：2021-06-10

申请号：US17179505

申请日：2021-02-19

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Tomomichi YASUOKA ,  Takashi KAYAHARA ,  Toshiaki SAKAI ,  Ryosuke NISHII ,  Takashi SHIGEMATSU

IPC: B23K26/21 ,  B23K26/08 ,  B23K26/00 ,  B23K26/06

Abstract: A welding method includes a step of, while irradiating laser beam toward a workpiece, relatively moving the laser beam and the workpiece and, while sweeping the laser beam on the workpiece, melting the workpiece in an irradiated portion to perform welding. Further, the laser beam is configured by a main power region and a sub-power region, at least a part of the sub-power region is present on a sweeping direction side of the main power region, a power density of the main power region is equal to or higher than a power density of the sub-power region, and the power density of the main power region is at least power density that can generate a keyhole.